# SPDX-FileCopyrightText: 2025 diffo_example contributors <https://github.com/diffo-dev/diffo_example/graphs.contributors>
#
# SPDX-License-Identifier: MIT

defmodule DiffoExample.Access.Path do
  @moduledoc """
  Diffo - TMF Service and Resource Management with a difference

  Path - Path Resource Instance
  """

  alias Diffo.Provider.BaseInstance
  alias Diffo.Provider.Instance.Relationship
  alias Diffo.Provider.Instance.Characteristic

  alias DiffoExample.Access

  use Ash.Resource,
    fragments: [BaseInstance],
    domain: Access

  resource do
    description "An Ash Resource representing a Path"
    plural_name :Paths
  end

  structure do
    specification do
      id "1d507914-8f76-48cb-aa0e-3a8f92951ab0"
      name "path"
      type :resourceSpecification
      description "A Path Resource Instance"
      category "Network Resource"
    end

    characteristics do
      characteristic :path, DiffoExample.Access.PathValue
    end
  end

  behaviour do
    actions do
      create :build
    end
  end

  actions do
    create :build do
      description "creates a new Path resource instance for build"
      accept [:id, :name, :type, :which]
      argument :relationships, {:array, :struct}
      argument :places, {:array, :struct}
      argument :parties, {:array, :struct}

      change set_attribute(:type, :resource)
      change load [:href]
      upsert? false
    end

    update :define do
      description "defines the path"
      argument :characteristic_value_updates, {:array, :term}

      change after_action(fn changeset, result, _context ->
               with {:ok, result} <- Characteristic.update_values(result, changeset),
                    {:ok, result} <- Access.get_path_by_id(result.id),
                    do: {:ok, result}
             end)
    end

    update :relate do
      description "relates the path with other instances"
      argument :relationships, {:array, :struct}

      change after_action(fn changeset, result, _context ->
               with {:ok, result} <- Relationship.relate_instance(result, changeset),
                    {:ok, result} <- Access.get_path_by_id(result.id),
                    do: {:ok, result}
             end)
    end
  end
end